Today is Human Trafficking National Awareness Day. One person who has been playing a key role in anti-trafficking has been actor Ashton Kutcher. He’s been using cutting edge technology and his organization, Thorn, to make a difference when it comes to children and human trafficking.

Here’s a look back at Kutcher’s testimony before Congress.

The actor testified last year before the Senate Foreign Relations Committee in a hearing on progress in combating modern slavery. Kutcher spoke on behalf of Thorn: Digital Defenders of Children, an organization he co-founded with then-wife Demi Moore in 2009 that builds software to fight human trafficking.

These days, he called his “day job” his work as chairman of Thorn and also as a father — he and wife Mila Kunis welcomed son, Dimitri Portwood, in November, and daughter, Wyatt, is two years old.

In an impassioned 15-minute opening testimony, Kutcher praised the committee for